Adjustable computer workstation



FIG. 1 is a perspective view of an adjustable computer workstation, showing our new design;

FIG. 2 is a side elevational view in fully raised position; and,

FIG. 3 is an elevational view showing the side not shown in FIG. 2 in fully lowered position.

The broken lines in FIGS. 1-3 are for environmental purposes only and form no part of the claimed design.

The rear of the article not shown is not part of the claimed design. 

The ornamental design for an adjustable computer workstation, as shown and described. 